Revision as of 15:37, 27 March 2012

--D. Thiebaut 16:20, 27 March 2012 (EDT)

Learning Assembly Through Exercises

Write a program that uses 3 byte variables, a, b, and c. The variable are initialized before the program starts with the values 2, 5, and 0, respectively.

The program will add up the contents of the variable a to that of b and store the result into c. Only c will change.

Assemble the program of Exercise 1
How many bytes does it contain?
How fast will it go from beginning to end, assuming each 6811 cycle is 1 µsecond?

Same as Exercise 1, but for the Pentium.
Assuming that the Pentium runs at a clock speed of 3 GHz, how many times could the program run on the Pentium while the same program run on the 1MHz 6811?

We want to compute Y = a + b - c + 3, where Y, a, b, and c are byte variables.
Write the program that performs this operation.
Assemble the program
Count the total number of cycles it will take to run, and the total number of bytes it will use up in RAM.

Write a program that computes the first 5 terms of the fibonacci sequence, assuming that your program starts with 5 variables that all zero.
Assemble it.
How many cycles?
How many bytes?

Let's learn about direct addressing mode
The excerpt below is taken from Introduction to 6811 Programming by Fred G. Martin.

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 * Let's learn about ''direct addressing mode''
+* The excerpt below is taken from [http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0CCYQFjAA&url=http%3A%2F%2Fciteseerx.ist.psu.edu%2Fviewdoc%2Fdownload%3Fdoi%3D10.1.1.126.6765%26rep%3Drep1%26type%3Dpdf&ei=piNyT7mpE-ru0gH_lrnLAQ&usg=AFQjCNGc-zkqp3OzNxE4Ou2FCdaLOyUEWQ&sig2=EyTqPc-9fn63o99ocK6n0w ''Introduction to 6811 Programming''] by Fred G. Martin.
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+<center>[[Image:6811AddressingModes.png]]</center>
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